Attachment for gas engines



May 31, 1927. 1,630,286

W. H. ALLEMAN ATTACHMENT FOR GAS ENGINES Filed July 2, 1925 kit PatentedMay 31, 1927;

' ,WIVLLIAM H.;ALL E1VIA1\T, or rrieantsmrcnreaim' i TTACHMENT iron GASENGINES. V

1 Application filed 11113 2,

This invention relates to the'air supply of'gas-engines and has for itsob ect the provision of a simple device which may be easily applied toan engine and by the use 'In the drawing, Figure 1 is an elevation of aconventional carbureter and cam shaft and a portion of the intakemanifoldof an i internal combustion engine.

Figure 2 is an enlarged plan view, with parts in horizontal section, ofthe central the engine block or otherwise held against displacement iportion of the cam shaft,

Figure 3 is a longitudinal section 'o'fthe central bearing of the camshaft,

a Figure 4 is a view similar to Fig. 3 but showing the parts in adifferent position,

Figure 5 is av transverse section on the line 55 of Fig. 3. Figure 6 isa transverse section on the 3 line 6-6 of Fig. 4.

The reference numeral 1 denotes the intake manifold, 2 the carbureter,and 3 the.

cam shaft of a four-cycle automobile engine, although it istobe-underst-ood that the invention may be applied to other en gines.

In the practice of my invention, as illus- 'trated, longitudinallyextending grooves or recesses 4 are formed in the central'bearing 5 ofthe cam shaft and spaced equi-distantly around the bearing, there beinga groove, or pair of grooves for each'cylinder of the engine. In thespecific construction illustrated, the grooves are arranged in pairs,the members of each pairbeing alined longitudinally of the bearing andseparated.

by a thin lip or spur 6 with the end surfaces of the grooves concave toproperly direct the air currents flowing over them.

The dividing lip 63, however, may be omitted and a single groovesubstituted for a .pair of grooves, and, instead of a groove or meresurface opening, the air channel may be produced by boring entirelythrough the hearing or shaft, especially when applying the invention toeznsting engines. Fitting closely about the bearing 5 1s a sleeve 7which may be fastened to the engine block 1526. Serial No/120,180:

or" otherwise secured, and through the wall of this sleeve are formedopenings 8 near its ends and a central opening .9, a pipe lO'leadingfrom the central opening into the trunk of the'manifold .above-the"car-'bureter, as shown in Fig. 1;?" The openings 8 and "9 are all on thesamelongitudinal line of the sleeve so that, as theggrooves 4 are broughtsuccessively to the Openings,

communication will be established between the end openings and thecentrahopeningand a-cu rr'entof air will be 'directediinto the pipe 10."V approved construction is inserted in the pipe 10 and is controlled bya rod'12 to the instrument board of the vehicle so, that flow throughthe pipe 10 may bereg-y,

ulated. according to the judgment of the chauffeur. The pipe 10 may besecured to It is well known that in cold weather or when starting theengine a richer fuel mixture is required than is needed after the enginegets warm or when running at a high a speed but, as frequent adjustmentof the carbureter is inconvenient and often troublesome, the carbureteris left in one adjustment, the result being that after the engine hasbeen running some timemore fuel 1s drawn into the cylinderthan is neededand this surplus fuel is an. economic loss;

My invention enables the chauffeur to save this fuel and thereby reducethe costof running the car. The openings 8 and 9 may be set so astotake' in air from the inside or outside of the motor enclosure but}the grooves or chambers 4; are so disposed that when any groove orchamber is in communi cation with the pipe 10 the piston in thecorresponding cylinderwill been the last half ofits intake stroke. Whenthe'piston' is entirely down, the cam shaft closesthe openings 8 and 9,as shown in Figs. "4c and. 6, and will keep. them closed until the] nextpiston admittedjto the cylinder which is charging has madeone-halfof'itsintake or suction stroke at whichinstant the succeeds, 4

ing grooves 4 will be brought into alinef-r without disturbing the"adjustment of the I 'carbureter. When the valve 11 is open, the v firsthalf of the suction stroke of the piston draws in fuel and during thelasthalfof the strokeair is drawn over the gas to fill the cylinder.When the ensuing explosion occursall the gas is burnt Withoutany cok-"1. An attachment for explosive engines comprising a pipe extending fromthe cam shaft to the intake manifold, [and means-at and controlledby thecamshaft for periodi- (rally-admitting air to the pipe.

2. 1311 attachment for explosive engines com-prising a'pi-pe" extendingfrom the cam shaft to the intake manifold a sleeve around thefcamishaftin direct communication with the pipeQ-said sleeve having openingsspaced from theflpipe, and means on the cam shaft to periodicallyestablish communication be: i I tween said openings and the pipe.

3. An attachment for explosive engines comprising a sleeve fittingclosely around the cam shaft and havinga plurality of longitudinally 'aliln ed openings, means on the cam shaft to periodically establish communication between the openings,= and'a pipe leading'from the centralopeningto the intake manifold of the engine; p 4. An attachment forexplosive engines comprising a cam shaft bearing having,

e'quidistantb spaced chambers in its circumferen'ce, a sleeve fittingclosely about said bearing and having a series of longitudinal" openingsthrough its Wall to be periodically placed in communication by'a chamberin the cam shaft bearing and apipe leading from one of the openings tothe intake manifold of the engine. V V

In test-imony whereof I have signed this specification.

WILLIAM if ALLEMAN

